how to make water level?:
how to make water level indicator circuit diagram. this circuit can use anywhere for water or oil levels. here used only 3 led for 3 levels. if we want to make more levels then we can increase more transistors and LED. here used NPN bc547 transistor. this circuit runs with 5 voltage.
transistor circuit diagram of 2sa1943 and 2sc5200
Build a Transformer or construct the transformer. home theater circuit diagram 5.1
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